This CM10 is engineered for supersonic 308 Winchester and compatible 7.62×51 NATO ammunition. It is not configured to cycle subsonic ammunition. Shooters seeking a semi-automatic system developed specifically for heavy subsonic loads should select the CM10 308 Subsonic AR10.
Photographs may show optics, suppressors or other accessories that are not included unless specifically listed.
CM10 308 Battle Rifle
The CM10 308 Battle Rifle combines a 16-inch 308 Winchester barrel with billet receivers, ambidextrous controls and an adjustable operating system. Its full-power chambering, balanced barrel length and conventional dual-feed magazine system give the rifle the practical characteristics associated with the battle-rifle class.
CM equips this 308 Battle Rifle with rifle-length gas instead of the mid-length gas system commonly used on 16-inch large-frame rifles. The longer system moderates the operating impulse and provides greater tuning flexibility, particularly when a suppressor is added later.
The rifle accepts conventional dual-feed LR/SR-pattern magazines. It is chambered for 308 Winchester and can also fire compatible 7.62×51 NATO ammunition. Compare CM10 rifles, CM7S bolt-action firearms, ammunition and supporting components in District 308.
Battle-Rifle Performance with Adjustable Operation
A practical battle rifle must balance full-power ammunition, portability and dependable operation. The 16-inch barrel keeps the system manageable while retaining the capability of 308 Winchester. The adjustable gas block and adjustable AR10 buffer allow the operating system to be tuned for ammunition, suppressor use and shooter preference.
Many 16-inch large-frame rifles use a mid-length gas system. CM instead uses rifle-length gas to introduce operating pressure later in the firing cycle, moderate carrier speed and increase the useful adjustment range.
This becomes particularly valuable when adding a suppressor. An enclosed suppressor can increase backpressure, carrier velocity and gas at the receiver. A flow-through suppressor can reduce those effects during supersonic operation. Combining rifle-length gas with adjustable gas and buffer systems provides greater control over either arrangement. See the 308 suppressor guide for a complete explanation.
CM10 Billet Receiver Set
- SR25-pattern receiver architecture with DPMS high-profile component compatibility
- CNC-machined from 7075-T6 billet aluminum
- Lightened fire-control housing and magazine-well surfaces
- Lightening cuts on the upper receiver
- Upper receiver without a forward assist
- Machined and flared magazine well
- Integral trigger guard
- Ambidextrous fire and safe markings
- Black Tungsten Cerakote
Ambidextrous Lower Controls
- CM ambidextrous safety selector
- CM ambidextrous magazine release
- CM10 ambidextrous bolt release
- CM10 pivot and takedown pins
- B5 Systems grip in black
Stock and Adjustable Buffer System
- B5 Systems Bravo stock in black
- Adjustable carbine receiver extension
- QD receiver end plate
- Adjustable AR10 buffer
- Receiver extension finished in Black Tungsten Cerakote
The adjustable buffer works with the adjustable gas block to control carrier speed and operating feel. This allows the complete operating system to be tuned rather than relying on the gas block alone.
TriggerTech AR Duty Trigger
The CM10 includes a TriggerTech AR Duty trigger with a choice of single-stage or two-stage operation. Its zero-creep release provides a clean, predictable break with minimal overtravel. Most customers select the single-stage trigger, although the two-stage option remains available for shooters who prefer a defined first stage.
CM10 Bolt Carrier Group
- 9310 steel bolt
- High-pressure tested bolt
- Magnetic-particle-inspected bolt
- Shot-peened bolt
- Nitride-coated bolt, carrier and gas key
- Hardened gas key
- Grade 8 hardened gas-key fasteners
- Properly staked gas key
- Tool-steel extractor
- T.E.A. extractor spring
- Black extractor insert
- Crane O-ring
Charging Handle and Adjustable Gas System
- CM10 ambidextrous charging handle manufactured from 7075 aluminum
- Rifle-length melonite gas tube
- Superlative Arms .750-inch adjustable gas block with nitrided finish
- Adjustable AR10 buffer
CM10 LWS Free-Floating Handguard
The 15-inch CM10 LWS handguard free-floats the barrel and provides continuous mounting space without adding unnecessary bulk to the rifle.
- 15-inch length
- 6061 aluminum construction
- Steel barrel nut
- Full-length Picatinny top rail
- M-Lok attachment surfaces along the sides and bottom
- Integrated QD sling sockets at the 3- and 9-o’clock positions
- Black Tungsten Cerakote
- B5 Systems rail covers in black
16-Inch 308 Winchester Barrel
- Chamber: 308 Winchester
- Length: 16 inches
- Material: 416R stainless steel
- Rifling: 5R
- Twist rate: 1:10
- Gas-system length: Rifle
- Gas-block journal: .750 inch
- Muzzle thread: 5/8×24
- Finish: Black Cerakote
Muzzle Device and Suppressor Use
The 5/8×24 muzzle thread supports common 308-caliber muzzle devices, direct-thread suppressors and suppressor mounts. Available muzzle configurations can vary with component availability and price. Contact CM before ordering if a particular suppressor interface is required.
The rifle-length gas system, adjustable gas block and adjustable buffer make this rifle well suited to suppressed supersonic operation. A flow-through suppressor can reduce excess backpressure and receiver gas, while an enclosed suppressor may require additional gas and buffer adjustment. Always follow the suppressor manufacturer’s caliber, barrel-length and mounting requirements.
Magazine
- One 20-round Magpul PMAG 7.62 LR/SR GEN M3 in black, where permitted
- Conventional dual-feed LR/SR magazine pattern
- Compatible lower-capacity LR/SR magazines may be used where required
Verified Dimensions
- Weight: 7.75 lb without optic, suppressor or other accessories
- Overall length: 32.75–36 inches
- Length of pull: 11.75–15 inches
Dimensions displayed elsewhere for shipping are packaged shipping dimensions and do not describe the rifle itself.
308 Battle Rifle FAQ
What makes the CM10 a 308 Battle Rifle?
The rifle combines a full-power 308 Winchester chambering, a 16-inch barrel, detachable dual-feed magazines and a compact adjustable stock. Its ambidextrous controls and tunable gas and buffer systems support dependable operation across different supersonic ammunition and suppressor configurations.
Why does this rifle use a rifle-length gas system?
CM uses rifle-length gas to introduce operating pressure later in the firing cycle, moderate carrier speed and provide greater tuning flexibility. This is especially useful when the rifle will be fired with a suppressor.
Will this rifle cycle subsonic 308 ammunition?
No. This CM10 is configured for the pressure and dwell time produced by supersonic ammunition. Choose the CM10 SUBSONIC when reliable semi-automatic operation with compatible heavy subsonic loads is required.
Can the CM10 fire both 308 Winchester and 7.62×51 NATO?
Yes. CM’s 308 Winchester firearms can use compatible 7.62×51 NATO ammunition. Always confirm that the ammunition is commercially manufactured, undamaged and appropriate for the firearm before use.
What magazine pattern does this rifle use?
The CM10 uses conventional dual-feed LR/SR-pattern 308 magazines. It does not use the AICS-pattern magazine found in the CM7S bolt-action platform.
Can this 308 Battle Rifle be suppressed?
Yes. The barrel has 5/8×24 muzzle threads, and the rifle-length gas system, adjustable gas block and adjustable buffer provide the tuning range needed for suppressed supersonic operation. The required suppressor mount or muzzle device depends on the selected suppressor.
Warranty
This complete rifle carries CM’s limited lifetime warranty for the original purchaser. Coverage applies to functional performance in the rifle’s original CM configuration and is subject to the complete warranty terms.
A Modern Full-Power Rifle
The CM10 308 Battle Rifle combines a 16-inch 5R barrel, rifle-length gas, Black Tungsten billet receivers, ambidextrous controls and an adjustable operating system. It offers full-power 308 Winchester performance in a balanced configuration with the adjustment range needed for unsuppressed or suppressed use. Explore the complete 308 Winchester family in District 308.
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